Doug Martin apparently suffered from a pretty serious mental health episode months before his death ... with a new report claiming he jumped out of a 2nd story window and got into a physical altercation with some police officers.
The San Francisco Chronicle made the claim in a new article published Wednesday, citing reports from the Alameda County Sheriff's Office ... reporting Martin was put on an involuntary psychiatric hold back in August.
According to the Chronicle, Martin checked into Tranquility Rehab Center in Castro Valley in August .